Door latch



w.- c DEVEREAUX June 23, 1925. I

noon LATCH Filed Aug. 23, 1922 I 8140014 601 Fl/0W a. Del e 7' ewwx G ttowugs Patented June 23, 1925.

UNITED STATES 1,543,064 PATENT OFFICE.

WILLIAM C. DEVEREAUX, OF DETROIT, MICHIGAN, ASSIGNOR TO FERRO STAMPING 8; MANUFACTURING COMPANY, OF IDE'JJROI'LL, MICHIGAN, A CORPORATION OF MICHIGAN.

noon LATCH.

a specification, reference being had therein.

to the accompanying drawings.

This lnventlon relates to latches, and 1s particularly applicabfgto latches for vehicle One of the objects of the invention doors. is the provision of a simple device for looking the bolt from longitudinal movement. Another object is the provision of a rotatable hub member adapted to actuate the bolt,

this hub member having an aperture therethrough for engagement by the operating shank of a door handle, the aperture having a flaring entrance for facilitating the engage ment of the operating shank therein. Further objects of the invention reside in the novel features of construction and combinations and arrangements of parts as more fully hereinafter set forth.

In the drawings:

Figure 1 is a rear elevation of a door latch embodying my invention with the cover plate shown in dotted lines; I Figures 2 and 3 are cross sections repectively on the'lines 22 and 33 of Figure 1; Figure 4; is a horizontal cross section through a vehicle door showing my latch in lan. p 1 is the case plate secured to themner side 2 of the vehicle door and having the transverse flange 3 secured to the outer edgeffl of the vehicle door.

5 is the longitudinally movable bolt slidable upon the case plate 1 and having its nose projecting through the transverse flange 3.

The inner end of this bolt slidably engages between the parallel struck out lugs 6 upon the case plate. 7 is a cover plate extending parallel to the case plate 1 and having tongues extending through the transverse flange 3 and riveted thereon. This cover,

plate is secured to the ease plate by means of the screws 8 passing through the cover plate and threadedly engaging the spacers 9 which extend through the case plate and are riveted thereto. The case plate has the open-ended slot 10 extending longitudinallythereof and registering with the bolt 5.

11 is a lever extending substantially parallel to the cover plateand pivotally secured thereto at its lower end, this lever being en'gageable with the upwardly extending lug 12 upon the bolt '5 to move the bolt inwardly or retract the same. This lever passes between the cover plate and the enlarged body of the bolt which is cut away for the passage of the lever. To normally retain the bolt in its'outer or looking position, I have provided a helical spring 13, one end of which is secured between the parallel lugs 14 struck out 'from the case plate 1 and the other end of-which abuts the forward end of the cutaway part of the bolt. To normally retain the lever 11 in ino erative position and abuttng the spacer 9 a ove the bolt,

I have provided the spring 15 coil ed around the spacer 9 below the bolt and having one v end abut'the lower struck out lug 6, and the other end abut the edge of the lever 11.

16 is a rotatable lock hub below the bolt 5 and journalled in the case plate 1 and cover plate 7 this hub having anupwardly extending actuating portion engageable with the lug 17 depending from the bolt. This hub has the aperture 18 therethrough for engagement in by the operating shank of the outside door handle and to facilitate the engagement of the operating. shank within the aperture, the entrances of the aperture are flared or inclined inwardly to guide the operating shank thereinto.

To look the bolt 5 from inward movement, I have provided the member 19 journalled in the case and cover plates 1 and 7 respectively above the bolt and adapted to have a wedge engagement with the bolt forward of the pivot. This member has a polygonal aperture for engagement in by a lock operating shank. Specifically, the bolt has in its upper edge the rounded recess 20 which is below the rotatable member 19 and the forward edge of which is in advance of the'pivot of the rotatable member so that when the rotatable member is swung through approximately 180, its periphery comes into engagement with the forward portion of the recess in the bolt preventing inward longitudinal movement of the bolt. To rotate this member from the outer side of the door to lockthe bolt, I have provided key actuated mechanism which includes the shank 21 extending into and fitting within slot 23 of approximately 180 in the cou-' pling 24 to which the shank 2i is secured by the transverse pin 25. The arrangement is such that the key for actuating the looking mechanism may be rotated through approximately 360 to rotate the member rotatable into wedging engagement with the longitudinally movable bolt.

Another important feature of my invention resides in securing the locking mechanism to the door in such a way that when the door is locked in closed position, the locking mechanism cannot be successfully tampered with. This is accomplished by forming aside of the housing preferably flat and inclined outwardly toward its inner end. Also, this side is corrugated. A suitable dowel 26 extending through the swinging edge of the door and into abutting engagement with the inclined side of the housing holds the locking mechanism within the door. The inclined side-is also preferably roughened or corrugated to assist ment, when the door is locked in closed position, the holding means for retaining the locking mechanism in the door cannot be tampered with without damaging or destroying the outer side of the door including the panel 27.

that I claim as my invention is:

In a door latch, the combination with a case plate, of a cover plate spaced from the case plate, a lockingbolt movable between the case plate and cover plate, a lever between said plates for actuating said bolt, lugs on one of said plates for guiding said bolt, interiorly threaded tubular spacers for said cover plate extending through the case plate and riveted thereto, screws extending through said cover plate and threadedly engaging said spacers, one of said spacers constituting a stop lever, and a coil spring surrounding the other of said spacers having one arm abutting one of said lugs and having another arm abutting said lever and normally holding the latter against the stop.

In testimony whereof I afi ix my signature.

WILLIAM C. DEVEREAUX. 

